Pneumatic-tool lubricator.



J. C. BBGKPIELD.

PNBUMATIG TOOL LUBBIGATOR.

rrLroA'rIoN runnin. as, 190s. nmsmwnn nso. 1s, 1907.

909,740. Patented Jan. 12, 1909.'

3 BREWER-SHEET 1.

J. C. BBCKFIELD. PNEUMATIG TOOL LUBRIGATOR. Arrmcu'ron FILED MAB. 2s,190e, nmmwxm DB Patented Jan. 12, 1909 3 SHEETS-SHEET Z Wifwksses: WU

J. C. BBGKFIELD. PNEUMATIG TOOL LUBRIGATOR. APYLIUATION FILED Mums,1903. BBNEWBD DBO. 16, 1907.

909,740. Patented Jan. 12, 1909.

3 SHEETS-SHEET 3.

W/ifzesses.' @10622250 UNITED STATES PATENT OFFICE.

JOHN C. BECKFIELD, OF PlVPSB'URG, PENNSYLVANIA..

PNEUMATIC-TOOL LUBRICATOR.

Application led larok 26, 1903, Serial No. 149,633.

To all whom 'it may concern:

Be it known that I, JOHN C. BECKFIELD, a citizen of the United States,residing at i Pittsburg, in the county of Allegheny and j Sta-te oiPennsylvania, have invented a new and useful Improvement inPneumaticflool Lubricators, ot which improvement the following is aspecification.

My invention'relates to degices for oiling l or' lubricating pneumatictools.,

Tin object of my invention is to produce an iler which is adapted to bearranged bei tween a source of air supply and a pneuniatically operatedtool, or 1n the air circuit of a pneumatic topl, in such manner that amodi'cum of the lubricant is taken up and carriedrby the air to' theoperative parte of i the tool. In one form of my device, air is i to bepassed into the'lubricant reservoir and 3 returned-to the main supplypipe, in its rei turn passage car in to the operative parts of the toola regu ate quantity of lubricant. i In another form of my device thelubricant is fed by capillary attraction to the air condliit at a pointapproximutin the median i line of volume of the vessel, an then carriedby the air to the operative parts of the tool. i

, To accomplish these objects my invention consiste 1n then novelconstructions` and arrangements of parts hereinafter `more specificallydescribed, reference being had to the accompanying drawings, formingpart hereof, in Which- Figure 1 indicates a central longitudinal 1section oflny improved automatic oiler. Fig. l 2 is a transverse sectionthrough the center l thereof. Fig. 3 is an end view of the thimble. lFig. 4 is a plan view of a modified form of diaphragm, one section ofthelubricant vessel being removed. Fig. 5 is a longitudinal seoj tion ofthe saine. Fig. 6 is a section through i the valve on line eea/.- otFig. 5. Fig. 7 is* an enlarged sectional detail of modified forni offeeder. F ig. 8 is an elevation of oiler and pneumatic tool connected.Fi 9 is a secj tional View of modified form ci; reservoir.

l Like reference characters indicate like parts 5 wherever they occur. iReferring to said drawings, A is a pneuj matic tool; B is :1 section ofhose connecting l the same with' the automatic luhricutor C, and D is aport-ion of the airsupply pipe. g, It will be observed that the oiler isin the air i circuit of the tool', and that the oil` or other ilubricant is charged therein to a point below l the median line of thevessel so that in what- Specifxcation of Letters Patent.

Patented J'an. 12, 1909.

Renewed December 16, 1907. Serial No. 406,766.

ever position the tool may be placed, or the oiler relatively thereto,the oil or other lubricant is prevented from oozing or leaking into [heair passage or tube but is conveyed or carried hy the air to the workingor operative parts of the tool A, in regulated quantities as hereafterspecified. The said lubricater comprises a vessel or reservoir, of anysuitable form, preferably formed in two sections, 1, 2, and arranged ordisposed in the air circuit of the tool at a suitable distancetherefrom. Section l is provided with an outwardly projecting threadedflange 3, which is adapted to be screwed into the annular threadedgroove 4, formed in the outwardly projecting flange 5 of section 2. Theedge of said flange 3, adjacent to the corresponding edge of flange 5,is provided with a recess o to receive the edges of the perforated plate7, which divides the interior of the vessel.

Section l. is provided with an inwardly projecting threaded tube 8, theopening in which is in alinenient with the air supply opening t), formedin the boss 10 projecting from the side of section Q. Immediatelyopposite said boss a similar boss 11 is formed on section 1, and section2 is likewise provided with an inwardly projecting tube 12 provided witha passage 13 in alinement with both the air supply and dischargeVopenings 9 and 14. The said sections when assembled constitute a singlechamber, the opposite sides of which are provided with contracted boresor orifices for the attachnicht of the adjacent ends ot' air supply pipel) and pipe or conduit B, respectively, with said chamber, the tube 15,the ends of which are located in said contracted bores,

1 constituting, in conjunction with said bores,

the continuous pipe or conduit leadin:y through said chamber. The innerends oi' the tubes n' and 1Q are enlarged forming!I a shoulder in thepassage, and a scat for ine connecting. adjusting and regulating tubel5, which projects therein, said tube being adapted for regulation ofthe air supplied to the vessel C and the oil carried from the vessel tothe air pipe, one end of said tube l5 being screw threaded und screwedinto the threaded portion of tube S. The said tube l5 is cylindrical incross section; the threaded end and a portion of its regulating end arecut to leave spaces o, b and c between the outer Wall of said tube 15and the inner'wall of the tube 8, in which said tube 15 projects; saidtube 15 is made smaller in the inner diameter than the inner diameter oftubes 8 and 12 for the purpose hereinafter specified. The other end iscut to foi-m taper passages for the admission of air to the oilreservoir. 1G and 17 are thimbles mounted on the tubes 8 and 12 and areof slightly greater diame ter than said tubes and 12 so as to form aspace d d between the inner walls of said t imbles and the outersurfaces of the tubes, for the purpose of better regulatin theintroduction of lubricant to the flui motive passage, also of preventingthe possible introduction of any organic substance to the passages intothe motive iuid or air passage. The inner ends of the thimbles areprovided with inwardly projecting flanges which snugly fit upon thecylindrical part of tube 15 at the point where the tubes 8 and 12approximately meet, and their outer ends with notches 18 and 19 toenable oil or other lubricant to enter the space d d, between the outersurfaces of the tubes and the inner walls of the thimhles. Section 1 isprovided with a boss or projection 20 in which a socket 21 is formed, aassage 22 from said socket to the interior o the vessel being providedto charge or fill the same, and a similar passage 23 to exhaust the airfrom said vessel. The socket is adapted to be closed by a. plug, and thepassages, particularl the oil charging passage, are arranged elow andangularly disposed with relation to the median line of the vessel, whenthe same is held iii chariging position, so as to prevent zhe filling osaid vessel up to said median ine.

In Fi s. 4, 5, and 6 I show a modified form of my eviee, in which thevessel or reservoir is formed of two sections A' and B-, which aresecured together by screws or bolts. Each of said sections is providedwith internally projecting tubes 8', 12', which are connected by aninternally disposed thimble or tube 15'; the inner ends of said tubes 8'and 12', res eetively, being enlarged to receive the en s of said tube15 whereby a continuous passage is formed between the supply anddischarge openings 9' and 1v1', respectively. An internal centrallydisposed diaphragm 7', having a central opening or orifice, whichsurrounds the connecting tubes 15', divides the interior of the vesselinto two compartments, and is perforated so as to permlt the contents ofthe vessel to more or less freely pass from one compartment to theother. The tubes S' and 12', respectively, have loosely mounted thereonthimbles 16' and 17'. The s upply opening of said vessel is controlledby a. two-way valve, 24, which contains a port to admit air through thecontinuous passage of the tubes or conduit, and also a port to replenishthe vessel with oil or other lubricant. Normally the air port of saidvalve is open and the port to replenish vthe vessel closed. i

In Fig. 7 I show a modified form of the lubricant feeding apparatus, inwhich, between tlie loosely mounted thiinbles 16" and 70 17", I insertthe absorbent material, desigi nated by the reference character 21',which covers t e inwardly rejecting air tubes 8"' and 12" and said asorbent material feeds or conveys the oil or other lubricant to the iinterior of the air passage in the manner `similar to a wick.

ln Fig. 9 I show a modified form of lubricant reservoir, which, insteadof being spherical in form, is oblon or substantially o long` and issubdivided y interiorly disposed funnel shaped cups, 22', 22', the sidesof which are perforated. This form` of reservoir is formed in twosections A2, B2, and the interiorly disposed tubes 8" and 12",respectively, approximatel coincide in depth with either section, anwhen said sections are secured together form a continuous passagethrough the interior of the vessel. The supply opening is controlled bya valve similar to that shown in Fig. 5, and. the funnels subdividingthe vessel interiorly are perforated so that more or less freecommunication is obtained between the different com artinents.

Tie funnel shaped cups 22' 22' serve to feed the lubricant to theopenings which are shown approximately on the median line of the vessel;and when the a paratus is shifted into any other position t ian thatshown in Fig. 9, the oil by gravity will ,be fed down the inclined cups22', 22', to said o enin and as a matter of course the oil wou d shicorrespondingly with the position in Ywhich the apparatus was held. Theagitation of 105 the apparatus when in actual use also causes a smallquantity of the lubricant to be fed or carried by the inclined cups, asshown in F ig. 9, to the median line of the vessel and from thence tothe operative parts of 110 the neiimatic tool.

T ie operation of my device is as followsz-The reservoir or vessel beinchar ed with any suitable lubricant, to a point be ow the median line ofthe vessel, and the oiler 115 being inserted or placed in the aircircuit of a pneumatic tool or similar device, or between a source ofsupply of air and the tool to be lubricated as shown in Fig. 8, air isadmitted to the air supply opening 9, assum- 120 ing that the air istraveling 1n that direction, and passing through the passage 13 impinges against the shoulders formed at the jnjiction of said passage 13with the end of tube 15, and passing therearound enters the 125 s acepassages (1.', enters the space between tlie thimble 17 and the tube 12,and thence through the notches 19 in said thimble'17 into the reservoir.On its return passage to 4the motive Huid passage, the air enters the130 space between the thimblc 16 and the tube 8 through the notches 18into the taper. passages c, l, c, into the motive fluid passage, .vliereit is taken up by the continuous flow of air to the tool beinglubricated, the air which entered they reservoir carrying with it on itsexit. passage. a portion of the lubricant contained therein,

It may be observed that the tube 15 is of smaller interior diameter thanthat of the inner diameter of the tubes 8 and l2 thus causing u more orless throttling action or slight interruption ot' the air at theentering ond ot tube iii causing a portion of the air lo be directedinto the oil coi'npartment of the` vessel, while the action of the airas it .discharges from the tube at the exit end thereot' 'is that of nsiphon, causing a suction on the ports at that portion and consequentlydrawingfroui the vessel the air previously forced into it by thepressure consequent on the throttliug` fiction at the entering end oftube It` will be ol'iserved that the point of inglress and egress ol theportion ol air diverted into 'the reservoir is preferably located at thepoint coincident with the median or near the median line of the vessel,and coincident with the level of the lubricant that may be containedtherein when the oiler is heid in a position that would throw the motivefluid passages in a vertical plane. This is for the purpose ofpreventing oil escaping into the motive fluid passages when the air isshut oil' and the vessel accidentally held in the position indicated.

il claim as my invention and desire to secure by Letters Patent:

l. An oiler comprising a vessel adapted to contain lubricant having anuninterrupted centrally disposed passageway therethrough for the passageof air, ducts located at a point slightly above the maximum level of thelubricant when the passage is vertically disposed, communicating betweenthe receiver and said motive fluid passage for the ingress of air tosaid reservoir and its egress there from, whereby the passage of airthrough said reservoir feeds a portion of the lubricant contained insaid reservior to the motive fluid passage. and means to prevent the discharge of lubricant from said reservoir except when carried therefrom bythe passage of air therethrough.

2. An oiler comprising a vessel adapted to contain a lubricant andhaving an uninter rupted passage centrally disposed there through forthe passage of motive fluid, means to luy-pass or divert a portion ofsaid fluid into the body portion of said vessel, andfmeans to enable thereturn of said di verted motive fluid to said motive fluid passage,whereby a portion of the lubricant is constantly carried by the divertedmotive fluid into the said motive fluid passage and from thence to theoperativo parts ol u motor connected to said oiler.

3. An oiler comprising a vessel having' a chamber adapted to contain alubricant, a motive fluid conduit extending through the vessel andsurrounded by the lubricant' chamber, and means adapted to ily-pass ordivert a portion of the motive fluid from` the conduit into the chamberand hack into the motive tluid conduit` whereby the diverted portion otthe motive tluid continuously introduces a portion ot the lubricant intothe motive fluid conduit to he carried along b v the motive tluid.

4. An oiler comprising a vessel having i chamber adapted to contain :ilubricant, :i motive tin-"d conduit extending through the vessel andsurrounded by the lubricant cham ber, means to cause a portion of theair to pass through said air passage to said reservoir, means to causethe air to return to said passage from said reservoir, and means toprevent the discharge of oil from said reservoir except by the passageof said air.

5. An oiler comprising a vessel having a chamber adapted to contain alubricant, in-

ternally projecting inlet and outlet tubes within the vessel, and anindependent tube connecting the inlet and outlet tubes and adapted toadmit the lubricant thereto.

t). An oiler comprising a vessel having a chamber adapted to contain alubricant, internally projecting inlet and outlet tubes Within thevessel, and an independent tube telesco Jing with the inlet and outlettubes and adapted to admit the lubricant thereto.

i'. An oiler comprising a vessel having a chamber adapted to contain alubricant, internally projecting inlet and outlet tubes Within thevessel, and an in ependent` connecting tube inserted in the ends of theinlet and outlet tubes and adapted to admit the lubricant thereto.

8. An oiler comprising a vessel having a chamber adapted to contain a"lubricant, 1nternally p'rogecting inlet and outlet tubes Within thevessel and having their inner ends located contiguous to euch other, anda perforated partition dividing the vessel into compartments which has aportion l0- cated between the contiguous ends of said inlet and outlettubes. i

9u An oiler comprising a vessel having a chamber adapted to contain alubricant, internally proJecting inlet and outlet tubes Within thevessel, thimbles surrounding said tubes, and another tube connecting theinlet and outlet tubes.

10. An oiler for meumatic tools comprising a vessel provided withinternally projectirtg inlet and outlet tubes, and an adjustable tubeconnecting saidinlet and outlet tubes and adapted to regulate thequantity of lubricant admitted thereto.

11. An automatic oiler for an air feed pipe comprising a reservoirhaving its chaniber provided with contracted bores for the attachment ofadjacent ends of air-feed pipe scctiona, a tube leading through thechamber having its ends located in Said contracted bores and ducts foropening communication from the chamber to the air feed pipe sections atthe opposite ends of the said pipe.

12. An automatic oiter for an air feed pipe comprising a reServoirhaving its chamber provided with contracted bores for the attachmeiit ofthe adjacent ends of air-feedpipe sections, a tube leadingithrough thechamber having its ends located in said contracted botessA and ducts inthe exterior walls of the ends of the tube for opening communicationfrom the chamber to the air-feedpipe sections for permitting the escapeof oil at one end of the tube and the admission of air at the other endof the tube.

13. An automatic oiler for an air feed pipe comprising a reservoirhaving its chamber t provided with contracted bores for the attachmentof the adjacent ends of the airfeed-pipe sections, a tube leadingthrough the chamber having its ends fitted to the said bores, therebeing ducts for opening commiuiication between the chamber and theair-feedpipe sectioiia at the opposite ends o1"- the tube for permittingthe.escape of oil in smal] quantities at the other end of the tube andan air-tight Filling-cup for the Said chamber.

14. An automatic oiler for an air-feed pipe coinprisii'ig a reservoirhaving its chamber provided with contracted bores for the attachineut oithe adjacent ends of the airfeed-pipe sections, a tube leading throughthe chamber having` its ende fitted to the bores and ducts at theopposite ends of the tube for permitting the escape of oil from thechamber at the one or the other end of the tube according to thedirection of `ioiv ot air through the air-feed pipe and the admission otair 'ti-oni the pipe to the chamber at the opposite end ot the tube fromthe end where the oi] ie permitted to escape.

In testimoniv whereof I have hereunto Signed in v naine in the presenceof two subscribing witnesses.

JOHN C. BECKFELD. 1n the presence of- CLARENCE A. UTILLIAMS, JOHN H.Romair.

